Here's our complete breakdown comparing the ingredients, attributes, and more of Kérastase Genesis Strengthening Serum for Hair and Scalp versus L'Oreal Serioxyl Advanced Denser Hair Serum .
Last updated on August 15, 2023. Published on November 28, 2023
Overview
What they are
These products are both reef safe hair serums. They have a total of 9 ingredients in common
Free From
They both do not contain any parabens, silicones or sulfates
What's Inside
They both contain harsh alcohols, common allergens and fragrances
We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that need an update? Let us know.
Hair Serum
Liquid-based hair treatment to help nourish the hair.
Hair Serum
Liquid-based hair treatment to help nourish the hair.
Price
Ingredient Info
Kérastase Genesis Strengthening Serum for Hair and Scalp 29 ingredients
L'Oreal Serioxyl Advanced Denser Hair Serum 12 ingredients
Contains Alcohol
Ingredients in this product that are types of alcohol:
Silicon Free
This product is free of silicons 🎉
Contains Fragrance
Ingredients in this product that are forms of fragrance:
Sulfate Free
This product is free of sulfates 🎉
Paraben Free
This product is free of parabens 🎉
Contains Oils
Ingredients in this product that are types of oil:
Not Malassezia Safe
Ingredients in this product that are not malassezia safe:
Reef Safe
This product is free of ingredients that damage reefs 🎉
Contains EU Allergens
Ingredients in this product that are EU allergens:
Non Vegan
This product is not vegan 😥
Not Cruelty Free
This product is not cruelty-free 😥
Contains Alcohol
Ingredients in this product that are types of alcohol:
Silicon Free
This product is free of silicons 🎉
Contains Fragrance
Ingredients in this product that are forms of fragrance:
Sulfate Free
This product is free of sulfates 🎉
Paraben Free
This product is free of parabens 🎉
Oil Free
This product is free of oils 🎉
Malassezia Safe
This product is free of malassezia feeding ingredients 🎉
Reef Safe
This product is free of ingredients that damage reefs 🎉
Contains EU Allergens
Ingredients in this product that are EU allergens:
Non Vegan
This product is not vegan 😥
Not Cruelty Free
This product is not cruelty-free 😥
At a glance
Click on any of the items below to learn more
Kérastase Genesis Strengthening Serum for Hair and Scalp 29 ingredients
L'Oreal Serioxyl Advanced Denser Hair Serum 12 ingredients
Notable Ingredients
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Benefits
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Concerns
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Concerns
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Join SkinSortIngredients Compared
Ingredients that are highlighted in purple are present in both products.
Kérastase Genesis Strengthening Serum for Hair and Scalp 29 ingredients
L'Oreal Serioxyl Advanced Denser Hair Serum 12 ingredients
Water • Alcohol Denat. • Arginine • Peg-40 Hydrogenated Castor Oil • Citric Acid • Niacinamide • Calcium Pantothenate • Caffeine • Limonene • Pyridoxine Hcl • Linalool • Polyquaternium-11 • Safflower Glucoside • Benzyl Salicylate • Coumarin • Citral • Benzyl Alcohol • Xylitylglucoside • Citronellol • Benzyl Benzoate • Anhydroxylitol • Xylitol • Zingiber Officinale Water • Ulmus Davidiana Root Extract • Resveratrol • Tocopherol • BHT • Sodium Citrate • Parfum
Ingredients Side-by-side
Ingredients that are highlighted in purple are present in both products.
Learn more about what what Com. / Irr. ratings are
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Water. It's the most common cosmetic ingredient of all. You'll usually see it at the top of ingredient lists, meaning that it makes up the largest part of the product.
So why is it so popular? Water most often acts as a solvent - this means that it helps dissolve other ingredients into the formulation.
You'll also recognize water as that liquid we all need to stay alive. Talk about multi-purpose! If you see this, drink a glass of water. Stay hydrated!
Learn more about WaterKérastase Genesis Strengthening Serum for Hair and Scalp contains this as ingredient number 1.
L'Oreal Serioxyl Advanced Denser Hair Serum contains this as ingredient number 2.
Alcohol Denat. is an alcohol with a denaturant property. It is created by mixing ethanol and other additives. It has a low molecular weight and will evaporate quickly. This helps other ingredients become better absorbed and dry once applied.
Alcohol Denat. is volatile and may cause irritation. It helps draw out natural oils in skin and dry out your skin.
One study from 2005 found adding emollients to propanol-based sanitizer decreased irritation.
Alcohol is antibacterial by nature. This can help preserve products and increase their shelf life.
Other types of astringent alcohols include:
Learn more about Alcohol Denat.Kérastase Genesis Strengthening Serum for Hair and Scalp contains this as ingredient number 2.
L'Oreal Serioxyl Advanced Denser Hair Serum contains this as ingredient number 1.
Limonene is a fragrance that adds scent and taste to a formulation.
It's found in the peel oil of citrus fruits and other plants such as lavender and eucalyptus. The scent of limonene is generally described as "sweet citrus".
Limonene acts as an antioxidant, meaning it helps neutralize free radicals.
When exposed to air, oxidized limonene may sensitize the skin. Because of this, limonene is often avoided by people with sensitive skin.
The term 'fragrance' is not regulated in many countries. In many cases, it is up to the brand to define this term. For instance, many brands choose to label themselves as "fragrance-free" because they are not using synthetic fragrances. However, their products may still contain ingredients such as essential oils that are considered a fragrance.
Learn more about LimoneneKérastase Genesis Strengthening Serum for Hair and Scalp contains this as ingredient number 9.
L'Oreal Serioxyl Advanced Denser Hair Serum contains this as ingredient number 11.
Linalool is a fragrance and helps add scent to products. It's derived from common plants such as cinnamon, mint, citrus, and lavender.
Linalool has the same effect as Limonene when exposed to air. Oxidized linalool can cause allergies and skin sensitivity.
Linalool has a scent that is floral, spicy tropical, and citrus-like.
Learn more about LinaloolKérastase Genesis Strengthening Serum for Hair and Scalp contains this as ingredient number 11.
L'Oreal Serioxyl Advanced Denser Hair Serum contains this as ingredient number 6.
Benzyl Salicylate is a solvent and fragrance additive. It is an ester of benzyl alcohol and salicylic acid. This ingredient can be naturally found in some plants and plant extracts.
In fragrances, Benzyl Salicylate may be a solvent or a fragrance component. In synthetic musk scents, it is used as a solvent. For floral fragrances such as lilac and jasmine, it is used as a fragrance component. The natural scent of Benzyl Salicylate is described as "lightly-sweet, slightly balsamic".
While Benzyl Salicylate has been associated with contact dermatitis and allergies, emerging studies show it may not be caused by this ingredient alone.
However, this ingredient is often used with fragrances and other components that may cause allergies. It is still listed as a known allergen in the EU. We recommend speaking with a professional if you have concerns.
Another study from 2021 shows Benzyl Salicylate may have anti-inflammatory properties.
Learn more about Benzyl SalicylateKérastase Genesis Strengthening Serum for Hair and Scalp contains this as ingredient number 14.
L'Oreal Serioxyl Advanced Denser Hair Serum contains this as ingredient number 9.
Benzyl Alcohol is most commonly used as a preservative. It also has a subtle, sweet smell. Small amounts of Benzyl Alcohol is not irritating and safe to use in skincare products. Most Benzyl Alcohol is derived from fruits such as apricots.
Benzyl Alcohol has both antibacterial and antioxidant properties. These properties help lengthen the shelf life of products. Benzyl Alcohol is a solvent and helps dissolve other ingredients. It can also improve the texture and spreadability.
Alcohol comes in many different forms. Different types of alcohol will have different effects on skin. This ingredient is an astringent alcohol.
Using high concentrations of these alcohols are drying on the skin. They may strip away your skin's natural oils and even damage your skin barrier. Astringent alcohols may also irritate skin.
Other types of astringent alcohols include:
According to the National Rosacea Society based in the US, you should be mindful of products with these alcohols in the top half of ingredients.
Any type of sanitizing product will have high amounts of alcohol to help kill bacteria and viruses.
Learn more about Benzyl AlcoholKérastase Genesis Strengthening Serum for Hair and Scalp contains this as ingredient number 17.
L'Oreal Serioxyl Advanced Denser Hair Serum contains this as ingredient number 10.
Citronellol is used to add fragrance/parfum to a product. It is often derived from plants such as roses. In fact, it can be found in many essential oils including geranium, lavender, neroli, and more. The scent of Citronellol is often described as "fresh, grassy, and citrus-like".
Since the Citronellol molecule is already unstable, Citronellol becomes irritating on the skin when exposed to air.
Citronellol is a modified terpene. Terpenes are unsaturated hydrocarbons found in plants. They make up the primary part of essential oils.
Citronellol is not able to be absorbed into deeper layers of the skin. It has low permeability,
Citronellol is also a natural insect repellent.
Learn more about CitronellolKérastase Genesis Strengthening Serum for Hair and Scalp contains this as ingredient number 19.
L'Oreal Serioxyl Advanced Denser Hair Serum contains this as ingredient number 8.
Resveratrol is a famous emerging antioxidant. It is a good alternative for sensitive skin types who cannot tolerate retinoids.
This antioxidant is most famous for it's anti-aging benefits. Studies show it combats the signs of aging by:
Besides anti-aging, this ingredient also helps with skin brightening and soothing.
The most effective forms of resveratrol are isobutyrate and butyrate. These have the strongest effect on increasing A1 collagen and reducing inflammation.
A note on it being a retinoid alternative: Despite it's amazing skin benefits, it is not a replacement for retinoids. However, it is recommended for people with sensitive skin or intolerance to retinoids.
Resveratrol is naturally found in grapes, peanuts, and berries.
Learn more about ResveratrolKérastase Genesis Strengthening Serum for Hair and Scalp contains this as ingredient number 25.
L'Oreal Serioxyl Advanced Denser Hair Serum contains this as ingredient number 4.
Parfum is a catch-all term for an ingredient or more that is used to give aroma to products. Parfum, or fragrance, can be a blend of hundreds of chemicals or plant oils. This means every product with "fragrance" or "Parfum" in the ingredients list is a different mixture.
In the US, the alternative name for parfum is 'fragrance'. The term 'fragrance' is not regulated in many countries. In many cases, it is up to the brand to define this term.
For instance, many brands choose to label themselves as "fragrance-free" because they are not using synthetic fragrances. However, their products may still contain ingredients such as essential oils that are considered a fragrance. One example is Calendula flower extract. Essential oil ingredients still impart a scent or 'fragrance'.
Depending on the blend, it can cause allergies and sensitivities on the skin. Some ingredients that are known EU allergens include linalool and citronellol.
Products use parfum often to give products a scent or cover up smells of different ingredients.
The bottom line is: not all fragrances/parfum/ingredients are created equally. If you are worried about fragrances, we recommend taking a closer look at an ingredient. And of course, we always recommend speaking with a professional.
Learn more about ParfumKérastase Genesis Strengthening Serum for Hair and Scalp contains this as ingredient number 29.
L'Oreal Serioxyl Advanced Denser Hair Serum contains this as ingredient number 12.
Here's what our community thinks of the ingredients in these two products.
Kérastase Genesis Strengthening Serum for Hair and Scalp 29 ingredients
L'Oreal Serioxyl Advanced Denser Hair Serum 12 ingredients
Usage
Here's some more info on how this product is used by our community.
When to use
Kérastase Genesis Strengthening Serum for Hair and Scalp 29 ingredients
L'Oreal Serioxyl Advanced Denser Hair Serum 12 ingredients
Alternatives
Our Dupe Finder has found 4 potential alternatives that have similar ingredients to Kérastase Genesis Strengthening Serum for Hair and Scalp.
See 4 alternativesOur Dupe Finder has found 5 potential alternatives that have similar ingredients to L'Oreal Serioxyl Advanced Denser Hair Serum.
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